Judy Greer stars opposite Chlo Moretz in Carrie as a sympathetic -but ultimately helpless -teacher who tries to defend the outcast teen. We caught up with the actress to ask how her own prom experience compares to the one in the film, why Halloween has a whole new meaning to her now that she's a mom, and why Chlo's powerful performance was at times "hard to watch." Carrie hits theaters this weekend.